#include<stdio.h>
int main()
{
	int a, b, c;
	scanf("%d %d %d",&a,&b,&c);
	if((a*a==b*b+c*c)||(b*b==a*a+c*c)||(c*c==a*a+b*b))
	printf("yes");
	else
	printf("no");
	return 0;
}
